"He's so talented. And he's such a visionary and so brilliant, it could just make me cry," Gaga gushed. "I just believe in him so much, and I believed in him before he came to my home."
Gaga recently revealed that her collaboration with Cooper came about when the actor visited her house and the two hit it off brilliantly over pasta and the piano.
"I just thought he was one of the most brilliant actors in the world and then when I met him in person, he was one of the kindest people I've ever met," Gaga recalled. "When we were together we were just so comfortable together and this whole thing that's happening is beautiful."
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Lady Gaga and Bradley Cooper Recall the 'Magical' Day They Decided to Make 'A Star Is Born' (Exclusive)
"Anytime you make art and people receive it and feel something, you feel that you've communicated to the world," Gaga explained. "That's why we are artists. That's our form of communication. Through art."
In the film, Gaga stars as Ally, an unknown singer-songwriter who is discovered and mentored by Cooper's Jackson Maine, a grizzled, world-weary country star.
"The chemistry was instant," Cooper said of his first meeting with Gaga. "[From] the minute that she was kind enough to let me come and talk to her about this potential project."
"So the fact that we forged a friendship by creating art together is kind of the most idyllic way to use that chemistry," he added.